40013044 has 12 divisors (see below), whose sum is σ = 71009568. Its totient is φ = 19724600.

The previous prime is 40013041. The next prime is 40013081. The reversal of 40013044 is 44031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70162 + ... + 70729.

It is an arithmetic number, because the mean of its divisors is an integer number (5917464).

Almost surely, 2^40013044 is an apocalyptic number.

It is an amenable number.

40013044 is a deficient number, since it is larger than the sum of its proper divisors (30996524).

40013044 is a wasteful number, since it uses less digits than its factorization.

40013044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140966 (or 140964 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40013044 is about 6325.5864550253. The cubic root of 40013044 is about 342.0323601722.

Adding to 40013044 its reverse (44031004), we get a palindrome (84044048).

The spelling of 40013044 in words is "forty million, thirteen thousand, forty-four".